I grew up in Huntington Beach which is near Irvine and went to college in Irvine. I may be able to help with advice. Rent all depends on how nice you want and how close to the ocean (Newport Beach).
Heath care may be part of your benefits from your company (you will need to see what they cover and how much you will have to contribute if you elect to use their plans), otherwise check out www.esurance.com . I used them when I was unemployed and as a contractor.